Im having a massive brain fart at the moment and Hicky and Rayne are on

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God please explain to me what x value the L is being based on, the legth on X as in the base of the triangle? I swear to god my slope answer is 100% right, i don't understand what other x value there is...
and i specifically don't get how you can get the distance without knowing the slope!

draw the triagle and think about x varying and what happens to y, knowing that (9,5) is the 'pivot' so to speak. as x tends to infinity, y tends to 5. as x tends 9, y tends to inifity. 5x/(x-9) is a function consistent with those limits, so it's your y. plug it in and there you go.

"I'll go," said Chagataev. "But what will I do there? Build socialism?"
"What else?" said the secretary.